So i feel although not provent yet, that my turbo has a small crack similar to RR's thread back in the day.
So im weighing up my options much like he did!
2nd hand ko3 or ko4 conversion.
I feel that prices have dropped on the ko4 kits so it wont be 4k!
....As one door closes, another one opens. So, as a K04 conversion is cheaper nowadays.......
Price-wise, as a real-world guide, JKM charge:
http://www.jkm.org.uk/performance/tfsik03k04conversion.htm < But if you can buy SteveP's or a new one from Loba, it will cost less. Depends which K04 option you feel most comfortable with.
It would be useful if you posted any pics of the crack. Is it in the same location as mine was?
As I was a few years ago (already!), I think you are at a fairly major Y-junction and it depends on your longer term plans for your car. To make sense of it all you will want bigger brakes and handling mods. A K04 car is undoubtedly faster but I have absolutely no regrets staying with K03.